Parallel LC Oscillator with CMOS
Inverter - I have used this parallel resonant LC oscillator circuit countless times. The oscillator frequency is determined by the inductor and capacitor values. I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Precision Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. it is highly stable under varying temperature and supply voltages. . . Circuit by David A. Johnson P.E.-May, 2000

Parallel LC Oscillator with CMOS
Inverter - I have used this parallel resonant LC oscillator circuit countless times. The oscillator frequency is determined by the inductor and capacitor values. I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Parallel port controls arbitrary-waveform generator - 06/13/02 EDN Design Ideas: You can use the parallel port of your PC and a few additional components to generate a powerful, easy-to-use arbitrary-waveform generator. By using a Visual Basic program with the circuit in Figure 1, you can generate any waveform (for example, sinusoid, triangle, amplitude- or frequency-modulated, or exponential decay] by simply entering its characteristic equation __ Circuit Design by Art Kay, Texas Instruments Inc, Tucson, AZ

Positive Feedback - The use of positive feedback is useful for producing oscillators. The condition for positive feedback is that a portion of the output is combined in phase with the input. For an amplifer with positive feedback the gain is given by the expression below. __ Designed by Carl R. Rod Nave Department of Physics and Astronomy Georgia State University Atlanta, Georgia 30302-4106 EmailRodNave @ gsu.edu

Precision Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery. it is highly stable under varying temperature and supply voltages. . . Circuit by David A. Johnson P.E.-May, 2000

Precision Waveform Converter uses Sawtooth Wave - 03/01/96 EDN Design Ideas: The circuit in Figure 1 can convert almost any waveform into another by coupling a sawtooth waveform with the reference inputs of a conventional bank of comparators. This addition allows the circuit to control the discharge time of CD more precisely. The circuit has numerous applications, __ Circuit Design by Richard Kowitch, Chicago, IL

Pulse Generator - This circuit is very useful while checking/operating counters, steping relays, etc. it avoids the procedure of setting a switch for the required number of pulses. By pressing appropriate switches S1 to...__ Electronics Projects for You

Pulse generator - Pulse Generator kit will generate a frequency in KHz which can form a good test gear project. This kit is based on the classic LM555 timer IC . __ Contact Rajkumar Sharma

Pulse generator - A 555 pulse generator circuit with a difference, the initial pulse is tailored by additional circuitry to match the duration of subsequent pulses.
__ Designed by Miroslav Adzic - Serbia & Montenegro

Pulse Generator & Signal Tracer - This simple circuit generates narrow pulses at about 700-800Hz frequency. The pulses, containing harmonics up to the MHz region, can be injected into audio or radio-frequency stages of amplifiers, receivers and the like for testing purposes. A high-pitched tone can be heard from the speaker of the device under test when all is working properly.__ Learning Electronics

Pulse generator aids IC testing - 09/01/09 Test & Measurement World:As ICs increase in complexity and decrease in size, their pin counts drop or, at best, remain constant. The result: a need for pin-saving measures like serial programming. in the past, multiple pins might have been available for programming an IC ’s current or voltage limit, but today’s ICs often encode that limit as a set number of pulses on a serial line. -- [Kevin Frick, integrated Products, Sunnyvale, CA]__

Pulse Generator Verifies Test Setups - 05/26/94 EDN Design Ideas: Verifying the rise-time limit of wideband test-equipment setups is a difficult task. in particular, you must often know the "end-to-end" rise time of an oscilloscope/probe combination to ensure measurement integrity. Fig1s circuit provide as an 800-psec pulse having rise __ Circuit Design by Jim Williams, EDN's most revered contributor, passed away in June 2011 after a stroke. He was 63.

Pulse Generator-High-Voltage - Voltage, by definition, is the electrical pressure that causes current to flow through a conductor. When that pressure is sufficiently high, a high voltage is produced. But how do we define high-voltage? is 100, 1000, or 10, 000 volts considered high voltage? When compared to 10 volts, they all can be considered high voltage __ Designed by Tony van Roon VA3AVR

Pulse Receiver - NOTE: Must register on this site __ Designed by Published in Elecktor July/Aug, 2010

Pulse Stretcher Increases ECL-Gate Gains - 01/20/94 EDN Design Ideas: stretches the output pulses of an ECL comparator by operating the ECL line receivers with unusually large pulldown resistors to the -15V supply. The large load resistance maximizes the gains of the emitter-follower output stages and speeds up the rising edges __ Circuit Design by Nicholas J Bucska, PC Peripherals, Louisville, CO

Pulse Width Modulator - The IC used is a CMOS
type MC14093, a quad 2-input NAND Schmitt trigger. if you wish, it can be directly interchanged with the CMOS
MC14011 but this type is noisy. The speed is adjustable from 0-max. Max rpm is 2/3 the supply voltage __ Designed by Tony van Roon VA3AVR

Pulse Width Trimmer Outdoes One-shots - 03/03/97 EDN Design Ideas: The simple circuit in Figure 1a trims the trailing portion of a large-width input pulse to a size as narrow as 10 nsec. The input to the circuit is an active-low TTL pulse longer than 10 nsec or a continuous low level after a hig __ Circuit Design by Shyam Sunder Tiwari, IGCAR, Kalpakkam, India

Pulsed Sensor Extends Battery Life - 01/01/98 EDN Design Ideas: Activating the sensor circuit in Figure 1 for 1 sec every 30 minutes lowers its 20-mA supply current to an average of 70 µA. For a battery comprising three AA Duracells, this pulsed operation extends the battery's life to several years. The sensor uses an optocoupler and an iR-emitting diode __ Circuit Design by Terry Millward, Maxim Integrated Products, Reading, UK

PWM CD4093 - The IC used is a CMOS
type MC14093, a quad 2-input NAND Schmitt trigger. if you wish, it can be directly interchanged with the CMOS
MC14011 but this type is noisy. The speed is adjustable from 0-max. Max rpm is 2/3 the supply voltage __ Designed by Tony van Roon VA3AVR

Ramp Controlled Light - The circuit described here can be used for controlling a decorative lamp from zero intensity to maximum intensity in a specified time. Typical applications are for controlling Christmas lamps and serial...__ Electronics Projects for You

Ramping & Displaying on LM3914 - Could be used for a Turn Signal indicator. Also includes an additional Circuit and PCB for Driving Higher Power Lights. __ Designed by G.L. Chemelec

RF & Waveform Generator - Generates RF-Frequencys 0.8-2.5 GHz (resolution 100Hz) , 22MHz-512MHz (resolution 125kHz-1MHz depending on frequency) and Waveforms 0-100kHz (resolution 1Hz). Waveforms are Sine, Square, Triangle, Pulse, Sawtooth (positive and negative). All modes work independently and can be used at the same time. Very convenient user interface with LCD Display and up/down/cursor functionality. But please don't expect an easy to copy, 10 Minute instant design. The waveform part is a nice project for everyone, but the RF part is only for very experience hobbyists. __ Designed by Herbert Dingfelder

RF oscillator uses current-feedback op Amp - 10/03/02 EDN Design Ideas: A current-feedback amplifier is a well-known component with many uses. its basic block diagram shows that its input stage is a voltage follower—in practice, a symmetrical emitter follower (Figure 1). The configuration samples the output current, converts it to voltage across a large impedance, and amplifies it to the output using a high-power, low-output-impedance amplifier __ Circuit Design by Victor Koren, Tioga Technologies Ltd, Tel Aviv, Israel